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frankman
20-08-2010, 07:48 PM
where do i find the formulas for figuring how much refrigerant to add for certain tubing lengths. like if you have a 40 foot lineset 3/4 and 3/8 i need to know how to add exact amount of refrigerant. you measure from the condensing unit to the metering device to determine total length right?

james10
20-08-2010, 07:51 PM
You need the manufacturers info on this one as modern splits are critically charged normally xxxgrams per meter for every meter over a certain length

frankman
20-08-2010, 07:54 PM
thanks for the info

martinw58
20-08-2010, 10:28 PM
the liquid line on modern splits is not a liquid line it is an expansion line so you need the maufactures info for the corect charge